CN112098315A - Working electrode for realizing electrochemical test in high-temperature and high-pressure water - Google Patents
Working electrode for realizing electrochemical test in high-temperature and high-pressure water Download PDFInfo
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- CN112098315A CN112098315A CN202011079398.4A CN202011079398A CN112098315A CN 112098315 A CN112098315 A CN 112098315A CN 202011079398 A CN202011079398 A CN 202011079398A CN 112098315 A CN112098315 A CN 112098315A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000000840 electrochemical analysis Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 123
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 5
- 210000004907 gland Anatomy 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229920001973 fluoroelastomer Polymers 0.000 claims description 5
- 230000005518 electrochemistry Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002848 electrochemical method Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The invention discloses a working electrode for realizing electrochemical test in high-temperature and high-pressure water, during test, a sample to be tested is placed in a high-temperature high-pressure kettle, one end of an electrode lead is connected with the sample to be tested, the other end of the electrode lead sequentially penetrates through a body, a sealing sleeve, a conical sealing ring I, a clamping ring, a conical sealing ring II and an upper end cap and then is connected with an electrochemical workstation outside a high-temperature and high-pressure container, the sealing of the electrode lead is realized by screwing a compression nut to extrude the double-conical sealing ring, a cooling device is also arranged outside the body to realize the sealing of the electrode lead and the sealing element at a lower temperature. The electrode of the invention has simple manufacture, high reliability, good sealing performance and convenient installation, and can realize the electrochemical test of the metal material in a high-temperature and high-pressure water system with the room temperature of 350 ℃ and the normal pressure of 22 MPa.
Description
Technical Field
The invention relates to the field of electrochemical test in a high-temperature and high-pressure water system, in particular to a working electrode for realizing electrochemical test in high-temperature and high-pressure water.
Background
Some key metal parts of thermal power plants and nuclear power plants are in service in high-temperature and high-pressure water for a long time, the corrosion resistance and the degradation degree of materials in special environments are of great importance, and the high-temperature and high-pressure electrochemical measurement technology is one of important means for evaluating the corrosion resistance, the corrosion behavior and the aging mechanism of the materials. Compared with the normal-temperature electrochemical testing technology, the electrochemical measurement under the high-temperature and high-pressure condition has greater difficulty, mainly because the sealing of the electrode and the high-temperature and high-pressure device is difficult to realize. At present, the domestic research institutes generally adopt electrodes provided by eastern Japan company or CORTEST company in the United states to carry out related tests, and the price of the electrodes is relatively expensive. At present, electrochemical measurement equipment or electrodes under high-temperature and high-pressure conditions are reported in China, but polytetrafluoroethylene is used as a sealing material in many patents on the premise that no cooling device is arranged, the elasticity of polytetrafluoroethylene is poor, the sealing effect is poor, long-term stability tests are difficult to perform (see patent CN 201910460646.0), and high-temperature and high-pressure water leakage can cause accidents. Besides, most high-temperature high-pressure electrochemical testing equipment patents only give schematic diagrams (CN201910376671.0 and CN201510044673.1), the structures and sealing modes of key positions of the equipment are not given, and the significance of guiding actual production and processing is not great. Therefore, a working electrode capable of realizing electrochemical tests in high-temperature and high-pressure water is needed to be developed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a working electrode for realizing electrochemical test in high-temperature and high-pressure water.
The invention is realized by adopting the following technical scheme:
a working electrode for realizing electrochemical test in high-temperature and high-pressure water comprises an electrode lead, a body, a seal sleeve, a seal ring I, a snap ring, a seal ring II, an upper end cap and a compression nut; during testing, a sample to be tested is placed in a high-temperature high-pressure kettle, one end of an electrode wire is connected with the sample to be tested, the other end of the sample to be tested sequentially penetrates through a high-pressure kettle cover and the electrochemical workstation which is located inside and outside the high-temperature high-pressure kettle is connected behind the body, the sealing sleeve, the clamping ring, the upper end cap and the compression nut, the sealing ring I is arranged between the sealing sleeve and the clamping ring, the sealing ring II is arranged between the clamping ring and the upper end cap, and the compression nut is screwed to extrude the sealing ring I and the sealing ring II to realize sealing of the.
The invention has the further improvement that a cooling device is arranged outside the body, the cooling device comprises a water cooling sleeve, a water cooling sleeve sealing ring and a water cooling sleeve compression nut, the water cooling sleeve is arranged outside the body, the water cooling sleeve and the body are sealed through four water cooling sleeve sealing rings, a water cooling cavity is formed between the water cooling sleeve and the body, a limiter is arranged on the body, one end of the water cooling sleeve is limited through the limiter, the other end of the water cooling sleeve is compressed through the water cooling sleeve compression nut, and the water cooling sleeve is also provided with a water inlet and a water outlet.
The invention has the further improvement that the sealing ring I and the sealing ring II are conical sealing rings, the upper end of the sealing sleeve is provided with a sealing ring groove I, the sealing ring I is arranged in the sealing ring groove I, the opening angle of the sealing ring groove I is smaller than the taper of the sealing ring I, the sealing ring I and the sealing ring I are in interference fit, and the sealing ring II and the clamping ring adopt the same sealing mode as the sealing ring I and the sealing sleeve.
The improved structure of the sealing device is characterized in that a sealing ring groove III is formed in the top end of the body, a sealing ring III is installed in the groove, a sealing ring groove IV is formed in the side face of the sealing sleeve, a sealing ring IV is installed in the sealing ring groove IV, and sealing between the body and the sealing sleeve is achieved by extruding the sealing ring III and the sealing ring IV during installation.
The invention has the further improvement that the sealing ring I, the sealing ring II, the sealing ring III and the sealing ring IV are all made of high-temperature fluororubber materials.
The invention has the further improvement that the body is provided with a screwing nut, the whole set of electrode system is arranged on the autoclave cover through the screwing nut, and the metal hard seal is arranged between the electrode system and the autoclave cover.
The invention is further improved in that the electrode lead is wrapped with an insulating heat-shrinkable tube.
In summary, the present invention has at least the following advantageous technical effects:
1. the invention is provided with the cooling device, realizes the sealing of the electrode lead and the sealing element at lower temperature, greatly reduces the sealing difficulty and increases the sealing reliability.
2. The electrode lead is sealed by the double-cone-shaped fluororubber sealing ring, and the sealing sleeve and the body are sealed by the double-O-shaped fluororubber sealing ring, so that the electrode lead is good in sealing effect, stable and reliable for a long time.
3. The insulating heat-shrinkable tube is arranged outside the electrode lead, so that the influence of the corrosion of the electrode lead on the test result is avoided, the insulation of the test sample with the autoclave and other metal parts of the electrode is ensured, and the test result is accurate and reliable.
4. The electrode of the invention has simple manufacture, high reliability, good sealing performance and convenient installation, and can realize the electrochemical test of the metal material in a high-temperature and high-pressure water system with the room temperature of 350 ℃ and the normal pressure of 22 MPa.
Drawings
FIG. 1 is a schematic view of the overall structure of the test apparatus of the present invention.
Description of reference numerals:
1 is a sample to be detected; 2 is an electrode lead; 21 insulating heat shrink tube; 3 is a body; 31 is a limiter; 32 is a seal ring groove III; 33 is a sealing ring III; 34, tightening a nut; 4 is a sealing sleeve, and 41 is a sealing ring groove I; 42 is a seal ring groove IV; 43 is a sealing ring IV; 5 is a sealing ring I; 6 is a snap ring; 7 is a sealing ring II; 8 is an upper end cap; 9 is a compression nut; 10 is a water cooling jacket; 101 is a water-cooling cavity; 102 is a water inlet; 103 water outlet; 11 is a water cooling jacket sealing ring; 12 is a water-cooling jacket compression nut; and 13 is an autoclave cover.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the working electrode for realizing the electrochemical test in the high-temperature and high-pressure water provided by the invention comprises an electrode lead 2, a body 3, a sealing sleeve 4, a sealing ring I5, a clamping ring 6, a sealing ring ii 7, an upper end cap 8 and a compression nut 9; wherein, during the test, in the test, the test sample 1 that awaits measuring is arranged in high temperature autoclave, 2 one end connection of electrode wire 1, the other end pass autoclave lid 13 in proper order and body 3, seal cover 4, snap ring 6, upper end cap 8 and gland nut 9 back connection are located the inside and outside electrochemical workstation of high temperature autoclave, and sealing washer I5 sets up between seal cover 4 and snap ring 6, and sealing washer II 7 sets up between snap ring 6 and upper end cap 8, realizes through screwing up gland nut 9 extrusion sealing washer I5 and sealing washer II 7 electrode wire 2's is sealed to realize the electrochemistry test in the high temperature high pressure aquatic.
The body 3 is equipped with cooling device outward, cooling device includes water-cooling jacket 10, water-cooling jacket sealing washer 11 and water-cooling jacket gland nut 12, water-cooling jacket 10 install in the body 3 outside realizes sealedly through four water-cooling jacket sealing washers 11 between the two, forms water-cooling chamber 101 between water-cooling jacket 10 and the body 3, is equipped with stopper 31 on the body 3, and water-cooling jacket 10 one end is passed through stopper 31 is spacing, and the other end utilizes water-cooling jacket gland nut 12 to compress tightly, and water-cooling jacket 10 still is equipped with water inlet 102 and delivery port 103.
The sealing ring I5 and the sealing ring II 7 are conical sealing rings, a sealing ring groove I41 is formed in the upper end of the sealing sleeve 4, the sealing ring I5 is arranged in the sealing ring groove I41, the opening angle of the sealing ring groove I41 is smaller than the taper of the sealing ring I5, interference fit between the sealing ring I41 and the sealing ring I5 is guaranteed, and the sealing ring II 7 and the clamping ring 6 are sealed in the same mode as the sealing ring I5 and the sealing sleeve 4.
The top end of the body 3 is provided with a seal ring groove III 32, a seal ring III 33 is arranged in the groove, the side surface of the seal sleeve 4 is provided with a seal ring groove IV 42, a seal ring IV 43 is arranged in the seal ring groove IV 42, and sealing between the body 3 and the seal sleeve 4 is realized by extruding the seal ring III 33 and the seal ring IV 43 during installation.
And the sealing ring I5, the sealing ring II 7, the sealing ring III 33 and the sealing ring IV 43 are all made of high-temperature fluororubber materials.
The body 3 is provided with a tightening nut 34, the whole set of electrode system is installed on the autoclave cover 13 through the tightening nut 34, and metal hard seal is arranged between the tightening nut and the autoclave cover.
The electrode lead 2 is wrapped by the insulation heat shrink tube 21, so that the influence of the corrosion of the electrode lead 2 on the test result is avoided, the insulation of the sample to be tested, the autoclave and other metal parts of the electrode is ensured, and the test result is accurate and reliable.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A working electrode for realizing electrochemical test in high-temperature and high-pressure water is characterized by comprising an electrode lead (2), a body (3), a sealing sleeve (4), a sealing ring I (5), a clamping ring (6), a sealing ring II (7), an upper end cap (8) and a compression nut (9); wherein,
during the test, in the autoclave was arranged in to sample (1) that awaits measuring, electrode wire (2) one end is connected sample (1) that awaits measuring, the other end pass in proper order autoclave lid (13) and body (3), seal cover (4), snap ring (6), upper end cap (8) and gland nut (9) back connection lie in the inside and outside electrochemistry workstation of autoclave, and sealing washer I (5) set up between seal cover (4) and snap ring (6), and sealing washer II (7) set up between snap ring (6) and upper end cap (8), realize through screwing up gland nut (9) extrusion sealing washer I (5) and sealing washer II (7) electrode wire (2) sealed to realize the electrochemistry test in the high temperature high pressure water.
2. The working electrode for realizing the electrochemical test in the high-temperature and high-pressure water is characterized in that a cooling device is arranged outside the body (3), the cooling device comprises a water cooling jacket (10), water cooling jacket sealing rings (11) and a water cooling jacket compression nut (12), the water cooling jacket (10) is installed on the outer side of the body (3), sealing is realized between the water cooling jacket (10) and the body (3) through four water cooling jacket sealing rings (11), a water cooling cavity (101) is formed between the water cooling jacket (10) and the body (3), a limiter (31) is arranged on the body (3), one end of the water cooling jacket (10) is limited through the limiter (31), the other end of the water cooling jacket (10) is compressed through the water cooling jacket compression nut (12), and the water cooling jacket (10) is further provided with a water inlet (102.
3. The working electrode for realizing the electrochemical test in the high-temperature and high-pressure water as claimed in claim 1, wherein the sealing ring I (5) and the sealing ring II (7) are tapered sealing rings, the upper end of the sealing sleeve (4) is provided with a sealing ring groove I (41), the sealing ring I (5) is arranged in the sealing ring groove I (41), the opening angle of the sealing ring groove I (41) is smaller than the taper of the sealing ring I (5), so that the sealing ring I (41) and the sealing ring I (5) are in interference fit, and the sealing ring II (7) and the snap ring (6) are in the same sealing mode as the sealing ring I (5) and the sealing sleeve (4).
4. The working electrode for realizing the electrochemical test in the high-temperature and high-pressure water as claimed in claim 1, wherein the top end of the body (3) is provided with a seal ring groove III (32), a seal ring III (33) is arranged in the groove, the side surface of the seal sleeve (4) is provided with a seal ring groove IV (42), a seal ring IV (43) is arranged in the seal ring groove IV (42), and the seal between the body (3) and the seal sleeve (4) is realized by extruding the seal ring III (33) and the seal ring IV (43) during the installation.
5. The working electrode for realizing the electrochemical test in the high-temperature and high-pressure water as claimed in claim 4, wherein the sealing ring I (5), the sealing ring II (7), the sealing ring III (33) and the sealing ring IV (43) are all made of high-temperature fluororubber.
6. The working electrode for realizing the electrochemical test in the high-temperature and high-pressure water is characterized in that a tightening nut (34) is arranged on the body (3), the whole electrode system is arranged on the autoclave cover (13) through the tightening nut (34), and a metal hard seal is arranged between the tightening nut (34) and the autoclave cover.
7. The working electrode for realizing the electrochemical test in the high-temperature and high-pressure water is characterized in that the electrode lead (2) is wrapped by an insulating heat-shrinkable tube (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011079398.4A CN112098315A (en) | 2020-10-10 | 2020-10-10 | Working electrode for realizing electrochemical test in high-temperature and high-pressure water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011079398.4A CN112098315A (en) | 2020-10-10 | 2020-10-10 | Working electrode for realizing electrochemical test in high-temperature and high-pressure water |
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| Publication Number | Publication Date |
|---|---|
| CN112098315A true CN112098315A (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011079398.4A Pending CN112098315A (en) | 2020-10-10 | 2020-10-10 | Working electrode for realizing electrochemical test in high-temperature and high-pressure water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095405A (en) * | 2019-05-30 | 2019-08-06 | 华能山东石岛湾核电有限公司 | A kind of sealing device and application method of high temperature pressure corrosion electrochemical working electrode |
| CN113984287A (en) * | 2021-10-18 | 2022-01-28 | 贵州航天电器股份有限公司 | A leakproofness detection device for metal seal type crimping contact |
| CN114199964A (en) * | 2021-12-10 | 2022-03-18 | 西安交通大学 | Electrochemical test electrode suitable for subcritical/supercritical water system |
| CN114778649A (en) * | 2022-05-09 | 2022-07-22 | 西安交通大学 | Electrochemical testing device suitable for subcritical/supercritical water system |
-
2020
- 2020-10-10 CN CN202011079398.4A patent/CN112098315A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095405A (en) * | 2019-05-30 | 2019-08-06 | 华能山东石岛湾核电有限公司 | A kind of sealing device and application method of high temperature pressure corrosion electrochemical working electrode |
| CN110095405B (en) * | 2019-05-30 | 2024-03-26 | 华能山东石岛湾核电有限公司 | Sealing device for high-temperature high-pressure corrosion electrochemical working electrode and use method |
| CN113984287A (en) * | 2021-10-18 | 2022-01-28 | 贵州航天电器股份有限公司 | A leakproofness detection device for metal seal type crimping contact |
| CN114199964A (en) * | 2021-12-10 | 2022-03-18 | 西安交通大学 | Electrochemical test electrode suitable for subcritical/supercritical water system |
| CN114778649A (en) * | 2022-05-09 | 2022-07-22 | 西安交通大学 | Electrochemical testing device suitable for subcritical/supercritical water system |
| CN114778649B (en) * | 2022-05-09 | 2024-01-09 | 西安交通大学 | Electrochemical testing device suitable for subcritical/supercritical water system |
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